The beta spectrum of RaE has been remeasured with improved techniques. The distribution is fitted by a shape factor appropriate to a once forbidden transition with a spin change, $\Delta J=1\mathrm{}$ involving interference between the $S$ and $T$ couplings. The experimental measurement is used to set limits on the ratio of the beta moments which are treated as parameters.

• Received 5 August 1954

DOI:https://doi.org/10.1103/PhysRev.96.1593